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   Gianni Rosato (gianni@disobey.net)'s status on Saturday, 18-Apr-2026 05:00:34 JST Gianni Rosato

   in reply to

   • Tommi 🤯
   • yawnbox :verified_gay:

   @tommi @yawnbox Hey Tommi, nice to meet you!

   I think something like https://github.com/fabianwimberger/immich-convert-originals might be close to what you're looking for? I haven't vetted it (I don’t batch process images for my personal use case), but you can check whether everything is preserved with `exiftool`.

   Broadly, there are 3 common image metadata formats you’ll run into: ICC (color information), EXIF (descriptive information about the photo, like your camera specs), and XMP (custom XML). If you procure a test file, run it through whatever tool/script/etc you’re thinking about using (libjxl, libavif, or something else), and check the before & after with `$ exiftool <image>` to ensure the metadata is the same, you should be good to go with any photos similar to the test case (e.g. you know they have the same metadata fields & file format).

   Good luck, lmk how it goes!

   • Embed this notice
     Tommi 🤯 (tommi@pan.rent)'s status on Saturday, 18-Apr-2026 05:00:36 JST Tommi 🤯

     • yawnbox :verified_gay:

     Hey @gianni I was just chatting with @yawnbox about a wild range of tech things, and, since I am starting to host an Immich instance in my home, I am considering to convert all my emails to JPEG XL, and I was wondering if there is a way to do so without risking to lose any metadata.

     I am happy to read any links you might have but I need them to be as simple as possible because encoding/decoding stuff confuses me a lot. Not my thing… This is why I found your article explaining how AV1 works in simple words absolutely illuminating! Anyway, I just want to save storage space.

     Also, I am a big big fan of Aviator, and I have been following your work for a while. Thanks so much for all of it!

     #JXL #JPEGXL #JPEG #encoding #decoding #image #metadata #compression